Oxocarbenium ion cyclizations for C-branched cyclitols: synthesis of a relay intermediate for fumagillin analogues.
Camara F, Angarita J, Mootoo DR. Oxocarbenium ion cyclizations for C-branched cyclitols: synthesis of a relay intermediate for fumagillin analogues. J Org Chem. 2005 Aug 19; 70(17):6870-5.